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    <script>
        // 翻转数组
        var arr = ['pink', 'yellow', 'orange', 'blue', 'green'];
        arr.reverse();
        console.log(arr);
        // 冒泡排序
        // 第一种
        var arr1 = [3, 4, 7, 1, ];
        arr1.sort();
        console.log(arr1);
        // 第二种
        var arr2 = [13, 4, 77, 1, 7]
        arr2.sort(function (a, b) {
            // return a - b;//升序的顺序排列
            return b - a; // 降序的顺序排列
        });
        console.log(arr2);
    </script>
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